Valentine radar detector: false laser warning due to brake lights?

Mine is '02 vintage and I get it too, seems to be only the neon type brake lights, incandescent and LED don't seem to bother it.

nate

It's somewhat buried on the valentineone.com website...

Yep. I just press mute and back the heck off from those dang Chevy Suvs - usually 6-8 sec. following distance keeps the V1 quiet.

Yeah, I'm pretty used to this now - and I know for a fact that the cops ain't running no stoopid laser in a 15kph traffic snarl on East

You'll hafta either disable the LD (NOT recommended 'cos it does work, even though laser detection is always a bit touch'n'go) or just live with the "bug". Some Chevy etc. taillights do seem to emit enough electromagnetic "radiation" at ~332THz to send V1 into Wail, Wail, Go Ballistic Mode.

'Fraid not. Damn those Chevy trucks! *smirk*

A laser is (essentially) just a concentrated light beam. I service equipment that uses lasers. In some test equipment, we use LEDs to "simulate" the output of certain lasers. (for the receiving equipment) Depending on what technology is used in a brake light, I can easily see how a V1 could be fooled by certain brake lights. They'd have to have "hot" spots, though, I would think, to trigger the V1. -Dave

Not just vehicles -- there's a video billboard along US 101 in Redwood City, California that always falses my V1. It's next to the Liberate building, and is an upgraded version of the old Circle Star theater marquee (demolished and replaced with Liberate).

Like someone else said, laser is just concentrated light, so most any concentrated light source can set it off. Too bad laser jammers are illegal in California -- but I haven't seen too many LEOs using laser here anyway, so it's all rather moot for me.

I believe this happens because V1 is so hypersensitive to 332THz signals. It hasta be so as to provide even a measurable chance of detecting a real police laser in time.

Chevy trucks/Suvs set mine off all the darned time. I just press mute and back off a little and hey, whaddyaknow, bliss again. :}

How about a big neon beer sign in my back window :)

nate

snipped-for-privacy@spamfreezone.yahoo.ca (Ricardo) wrote in news:3f71fcd0.1999510@news:

Where did this "332 TeraHertz(THz,10E-12)" figure come from? AFAIK,laser speedguns use a 904 nanometer(10E-9) wavelength laser diode,with a very short pulse width of ~30 nanosec,and pulse repetition rates of ~500hz.

Something does not compute.

"Matt" wrote in news:Mvncb.3678$ snipped-for-privacy@nwrdny02.gnilink.net:

I suspect the V1 simply looks for PULSED IR light.Perhaps within some window of pulse length,and probably not band-filtered for any particular wavelength.

tera = 10^12, not 10^-12.

Wavelength and frequency of light are related by

c = lambda * nu

Where c is the speed of light, lambda is the wavelength, and nu is the frequency.

The wavelength corresponding to 332 THz is (3e10 cm/s) / (332e12 s^-1) = 9.04e-5 cm = 904 nm. As you say...

Yes, it does.

Someone's on the ball! :}

Sure seems to eh? :} It's always nice to cast a new perspective on things, especially something as innocuous and nightmarish as a police laser. I really almost have had nightmares about those darn things.

snipped-for-privacy@wopr.caltech.edu (Matthew Hunt) wrote in news:bktcl3$sut$ snipped-for-privacy@naig.caltech.edu:

Yes,you are absolutely correct.Thanks.

Thank your lucky stars. Though Vascar is evil too fwiw.